The answer may not be certain, but for all those wondering how to win the battle against a graying head of hair, perhaps winning a presidential election is the answer.

Photos of Obama before and after Election Day show a marked difference in the tint on his noggin.

President Barack Obama on Nov. 14, 2012

Paul Bedard of the Washington Examiner was among those who noticed the change, writing, “President Obama’s re-election didn’t just put a bounce in his step. It appears that it also erased his gray hair. Appearing in the East Room Wednesday for his post-election press conference, the chatty Obama displayed a head of rich, black hair. Photos and even the White House live stream of the session showed no more gray. But just a week ago, at the end of his campaign, the president had a head of salt and pepper hair with lots more gray.”

Ironically, on Oct. 25, when Mr. Obama cast his own early ballot, he was asked to show his I.D.